org.apache.kafka.common.network.ByteBufferSend Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.kafka.common.network;
import java.io.EOFException;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.GatheringByteChannel;
/**
* A send backed by an array of byte buffers
*/
public class ByteBufferSend implements Send {
private final String destination;
private final int size;
protected final ByteBuffer[] buffers;
private int remaining;
private boolean pending = false;
public ByteBufferSend(String destination, ByteBuffer... buffers) {
this.destination = destination;
this.buffers = buffers;
for (ByteBuffer buffer : buffers)
remaining += buffer.remaining();
this.size = remaining;
}
@Override
public String destination() {
return destination;
}
@Override
public boolean completed() {
return remaining <= 0 && !pending;
}
@Override
public long size() {
return this.size;
}
@Override
public long writeTo(GatheringByteChannel channel) throws IOException {
long written = channel.write(buffers);
if (written < 0)
throw new EOFException("Wrote negative bytes to channel. This shouldn't happen.");
remaining -= written;
pending = TransportLayers.hasPendingWrites(channel);
return written;
}
}